I fit a Kaaz differential to my fiesta st (pt1)

Is this the best modification i will ever fit to my fiesta st 180? This is a kaaz super q plated limited slip differential supplied by part box uk. click the link below to get prices on any of your car parts
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2014 fiesta st mod list below
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Fiesta st 180 list mods so far ;
scorpion sport cat
R sport PRO 400 gen2 intercooler
itg air filter
R sport crossover
R sport hot side pipe kit.
pumaspeed short shifter
Rsport baffle sump kit
Maxd out stage 2r cat safe crackle map
milltek non res exhaust
Delta styling front bumper , splitter , side skirts
GFB DV
Meisterr clubrace coilovers
Endless me22 pads
braided brake lines
coolerworx short shifter
ebc rpx front pads as of 18/07/2020
ebc bluestuff rear pads
kaaz super q lsd

[@sparkplug964]

Bloody hell I did realise how mush work it is to fit a LSD, great work as always Steve, I learned allot watching this video.

[@CookRacingUK]

Genuinely really interesting, you'd never know shims were so important so thanks for passing on all your research. Also, loving the tool improvisations! What we welsh lack in money (or just being tight) we make up with ingenuity :D

[@akkual]

FWD gearbox diff shimming seems much easier than RWD, as (I guess) the drive gears are parallel and not in 90 degree angle. I do not remember exactly how it goes, but something like you need to shim RWD diff so that the big gear and small gear align with as big contact patch as possible, and there is certain tolerance of play that must remain between them, and you need to measure that play. Otherwise the gears will wear out or bang each other in pieces. Shouldn't be such risk on FWD gearbox and diff, as there's no angle between the gears.

[@jamiehall8188]

Questions in comments annoying you by any chance...... don't let it bother you mate brilliant content

[@fireonmytarget8937]

You have a very cool setup here - I like your skylight roof!

[@michaelfinchett4199]

Great video steve , good to see what goes into upgrading a diff

[@mikeberry304]

Looking good Steve , keep at it , your doing a great job

[@michaelford1383]

Your videos are class mate. I started when you got your first crashed st. Loved them since.

[@Nodtune]

Hey Steve what about a video on how you get the 4 wheels in the air at a track day for working at the car. Like jacking points that. Great videos keep them up. Just got an st fiesta to tinker with myself.

[@realbigtuna667]

Waiting on my wavetrac lsd. I don't have the balls to do it myself though. Props to you!

[@benopperman3277]

Taper roller bearings are matched during manufacturing and work best installed as a set and therefore not a good idea to install new inners into the old outer races.

[@st200ol]

I was going to comment the same, I've always replaced them as set for the same reason. If the set isn't changed then I bet there will be race to bearing high-spots = messed up preloads as they wear.

[@ianberry1713]

Blimey! So much to do. Great explanation of what you have to do Steve.

[@robsmith7430]

Bloody hell steve your such a tease, I only hope we don’t have to wait long for the next part, loving the videos buddy 👍

[@Sprintcup1]

Top job, been looking forward to the fitting of the LSD, can't wait for the 2nd segment, keep them coming. Cheers Russ.

[@dannyboy0236]

💯 for effort Steve, don’t own a st but always find your videos interesting.

[@Sparkplugsteve]

Thanks Dan.

[@DanielP-c9g]

Great video, cant wait for part 2. Love your channel Steve!

[@Q3ToPBuZz]

Brilliant video Steve. So helpful. Cant wait for next one. 👍

[@Kandlers_Monkey_Orchestra]

Maybe the spec of .014 pre load is PER BEARING that would be .028" total which is exactly what you measured

[@MrTurbo_]

Am planning to get a lsd as well after going stage 3 with the x48, but I'll probably just get a new gearbox at the same time as pumaspeed sells them with pre-installed quaife diffs and my gearbox got 130k km on it already, so this video is very helpful, gonna have to do something similar in the garage

[@shaungowler8909]

Great video Steve looking forward to part 2 keep up the great work would the install of the lsd more or less be similar to other installs of the ford cars would like to fit one to my ib5 box would the shim situation arise also with that install again look forward to more content car come along way evolved a lot 👍🏻

[@steven907]

SPS the mad professor 👨‍🏫😂👌

[@HAppyD4yz123]

I am loving these videos Steve keep em coming👌🏻👍🏻

[@Ford84]

Sublime as always Steve! Clever bloke! 👍🏻

[@mansdaz]

Thanks Steve very good video enjoyed it all best Daz.

[@Alexander_l322]

I literally just got a notification for this video ‘spark plug Steve uploaded’ 1 min ago and this was uploaded like 4 days ago!? What the hell is going on lol

[@Sparkplugsteve]

No idea. 👍

[@andrewjones4285]

Really interesting steve. Thanks.

[@ZC33S_Lefty]

Would you advise me changing the bearings and seals on my Suzuki Swift Sport ZC33S K14C 2019? I have the same LSD that I'll be fitting on to it

[@DANI3L7292]

Making me want to do this major upgrade on my us st

[@fordyford]

Every time you say "Ello KZbin" my wife responds "Ello" in a dodgy Welsh sccent by an Aussie. Keen to see how you feel on track with the LSD and why it is/isn't better. I'm sure it is.

[@rtashev]

Awsome video ! Could you go more indept about the shims and what role they play ?

[@Sparkplugsteve]

I thought I did? They determine how much preload or pressure will be put on the bearings. Ford specify close to 0.14mm of preload pressure. So the shims are designed to get you close to that figure.

[@garethdavies680]

Great vids pal 👍

[@brandonmorris995]

Love these videos

[@alnlim00]

Is that a 100mm vise you are using? It looks beefy as!

[@agt155]

Wonder about the thickness of liquid gasket.

[@eamonmchugh701]

Another great video

[@freddylao]

Funny man, last time you shared about the LSD and that was the day I received mine. Now I see your update on it and I just got mine installed. Run it for about 100km already and it feels very good. 2 things I noticed: the first gear in slow speed is very hard to turn. The second gear 3k rpm with small throttle already pull you a lot. A low better than my previous MFactory 1 way LSD. I believe you can do a better in the track with this Kaaz LSD. Just remember to fully turn off the ESC 😂

[@Sparkplugsteve]

So you have the kaaz also?

[@freddylao]

@@Sparkplugsteve I just installed that yesterday and got my car back this morning. I am running with the default setting as my car is my daily. Really a good choice

[@Sparkplugsteve]

Really good isn't it.

[@freddylao]

@@Sparkplugsteve I believe it is the best mod. More fun and performance gained than an upgraded Turbo. 👍🏻

[@Sparkplugsteve]

My first drive blew my mind.

[@omarkoulache4838]

Is this mod doable for a manual gearbox 1.25 fiesta?

[@Chris-zp6eh]

Will this help with torque steer?

[@JC21x]

Fez is turning into i right weapon. pretty jealous tbh. My french heap just gives me problem after problem 😂

[@Sparkplugsteve]

Iv been down that road before when I had a focus St170 as a track car. I spent more time fixing things than enjoying it. Granted most things broke because I modified it too much lol

[@JC21x]

@@Sparkplugsteve Hahah yeah, i'm starting to regret getting rid of me EP3, nothing wrong with it all it needed was some boost. Should have done it :( but never mind!

[@steveguest8028]

So when your preload was too much at 0.45mm(too much pressure on bearing)the space between the casings needs to be increased, so when changing the shim from 0.50mm to 0.30mm doesn’t that increase the preload ? Or did you add the 0.30mm shim to the already fitted 0.50mm shim ? ...... as you say it is confusing 🤣

[@Sparkplugsteve]

0.3 is smaller than 0.5 so the preload is 0.2 less. So the bearing race is moved out away from the bearing by 0.2

[@steveguest8028]

@@Sparkplugsteve Yes I’m with you now Steve 👍

[@rd6781]

Guys sorry if this is off topic. I just got a fiesta st mk7 and am looking at a CP2E upgrade. Is the exhaust and uprated intercooler very beneficial? Car won't be used on track just normal/spirited driving. Does the catback exhaust give much in the way of power output?

[@stegillibrand3740]

You would need a decatt/sports cat for the CP2E not for the CP2 thoo

[@ibana8449]

Steve, I have a spaceframe Fiat 126 which I recently swapped over from a bike engine to a 1.6 Ecoboost. Engine is about to start getting some extensive work including a new uprated clutch, looking for 350bhp+ . Looking to reduce costs I have this week decided not to fit a Blackline LSD, what made you go for the KAAZ at £200+ more ? Love the channel, much good information without young boy froth. My car is iat Scottish kitcar centre on facebook if you want to follow the progress.

[@rtashev]

From what research I've done the Blackline diff is a Chinese one and is lower quality (they require you to change the oil after 100 km, in order to prevent any shavings from the diff damaging the gearbox). Blackline is not a plated diff like the KAAZ (check steeve's last video where he opened the kaaz and showed the diff plates), it is more similar to a Quaife or Mfactory diff. I think for my fiesta I'm going with Mfactory as I found it the cheapes on focusrsparts.com and it seems to be high quality

[@Sparkplugsteve]

I really wanted a plated diff and not just a torque biasing one.

[@ibana8449]

@@rtashev Thank you Radoslav, appreciate the feedback.

[@26DX047]

Interesting video 👍

[@TheTechnoaddict]

Never use old races with new inner!! Replace as set!

[@Sparkplugsteve]

Tell ford and quaife the same 😁

[@TheTechnoaddict]

@@Sparkplugsteve i work with bearings in lots of industrial applications. My boss would slap me silly if i re-use old races😁

[@Sparkplugsteve]

I don't disagree with you. But it's widely done in fitting diffs.

[@lewisperie5121]

Nice one

[@anthonytessier1324]

Cool 👍🇫🇷

[@ZafiraSteve]

Changing clutch whilst inn there?

[@Sparkplugsteve]

Yes in part 2.

[@JH24820]

Can’t beat an st it’s like a turbo charged micra

[@-Burts30]

Gas mark 6 for 30 mins

[@roberttaylor465]

Be a lot of understeer, lsd on a fwd isn't always better.

[@Sparkplugsteve]

I'm struggling to process your comment to be honest. Is this from your personal experience or did you read that?

[@jasonsalt524]

Such a long process 🤭

[@jmp4285]

👍👍👍

[@TIM612826]

Your not just a window cleaner. Lol

[@bensullivan]

Good stuff. I did a full rebuild of my trans last year. I made a post about it here: blog.sluggyjunx.com/rebuilding-the-transmission-in-my-2014-ford-fiesta-st/ Includes annotated manual pages and part numbers, etc. One comment- AFAIK the bearing cups and carriers are matched pairs so in general you want to replace both the cup (race) and the cage/carrier/rollers and not one or the other. I got lucky with my shims. Was able to re use the .5mm shim which was nice. (Yes, I followed the procedure in the manual to measure the pre load.) :) Keep it up. Love the vids.

[@YoungQwasson]

Hi mate, Currently in the process of rebuilding my trans which has a bad input shaft bearing. I had your blog bookmarked but the website seems to have gone down. Any way you can send me the manual pages and part numbers? would be a huge help

[@bensullivan]

@@YoungQwasson FWIW, the site is back up. 👍

[@mickducati1947]

😜👍